Hi, 
Thanks for posting in HCM. 
Yes, Lezra would help to increase 
sperm count. 
Lezra contains 
Letrozole which belongs to a group of medicines called aromatase inhibitors.
It is known to act by increasing the FSH (
follicle stimulating hormone) and LH (Luetinizing hormone) from 
pituitary gland,which helps in improving sperm formation, maturation and its survival. 
It might cause some side effect like headache, nausea and vomiting, which can be treated symptomatically. 
You can also add L-carnitine, 
lipoic acid, CoQ10, Vitamin E, Vitamin C, Selenium and Zinc containing medications, which would also help in sperm maturation process.
Hope the information provided would be useful. 
All the best.